Internal-combustion engine.



E. A. RUNDL'O'P. INTERNAL GOMBUSTION ENGINE.

APPLIUATION FILED mm1?, 1910;

Patented Aug'. 2, 1910.

Inventar witness@ s ceases.

To all whom 'it larly engines of the said vair \ is alternately shut oil ERIK AN TON .RUN DLF,

or' sTocKsUND, NEAE STOCKHOLM, SWEDEN.

INTERNAL-CQMBUSTION ENGINE.

Application filed March 1'?,

may concern: Y

Be it known that I, ERIK ANTON RUND- LE, a subject of the King of Sweden, resid# ing at Stocksund, near Stockholm, in the Kingdom of Sweden, have invented newand useful Improvements in Internal-Combustion Engines, of which the following specication,

' orming a part This invention relates to improvements in internal combustion engines.

cleaning-air is caused to pass through the explosion -or ignition chamber for expelling the'gas residue after the explosion, particukind which are regulated by varying the number of ignitions, have the drawback that at small loads the quantity of air passing through the ignition chamber will be too great in comparison with the number of ignitions therein, by" which the ignition chamber will be cooled in such a degree that the explosions may fail.

The object of theinvention isto remove the said drawback and make it possible to regulate the temperature of the ignition chamber for varying loads. t

The invention consists, chiefly, in the combination with the ignition chamber of means for regulating the direction or path ofthe air current through the cylinder of the engine in such a manner that a greater or less part of the air current is caused to pass through the ignition chamber, according as the load varies. The said means may consist of shutters, valves or the like, placed inthe assage or passages between the cylinder and the ignition chamber or better inthe passage extending from the air compression chamberof the engine through the wall of the cylinder where the mouth of the same and laid open by the The recess in the Vsaid or directs the column cylinder so as to cause l Internal combustion engines in whichthe reciprocating piston. piston which conducts of air issuing into the the same to' pass along the inside of the wall l thereof may be divided by partitions or the l like into compartments, preferably three, of

Specication of Letters Patent.

Patented Aug. 2, 19MB. 1910. serial No. 549,893. l

which the middle one corresponds to or is located 'j ust opposite the inlet passage into the ignition chamber, while the two others are placed at the sides thereof. The air passage through the cylinder wall suitably corresponds in Width to the recess in the piston and may be divided into compartments, like the said recess, or it may be open to its whole length, as may be desired. In either case, shutters may be.

piston that, when the piston opens thel inlet, air is free to pass in dierent ways into the :diiferent compartments of the recess in the piston. Thus air may be caused to pass for instance into the outer compartments, in which case no air or an inconsiderable quantity of air enters'the ignition chamber, or into the middle compartment solely, -in which case .the greatest part thereof, enters the ignition chamber, or into all the compartments of the piston, or into the middle one and one of the lateral compartmentst ments should thus have a separate shutter,w each of said shuttersbeing adapted to be opened and shut independently of the others.

The shutters are suitably placed in the sta` tionary passage, whether divided or undivided, extending through the cylinder wall, but, if desired, they. may be placed in the separate compartments of the movable piston. lf desired, the shutters may be entirely-dispensed with, in which case the division into compartments-acts to equally disignition chamber or it may create the said whole quantity of air, or the Each ofthe compart.

' the ignition chamber.

air current solely,

.the action of while the air current created by the working piston is led into the cylinder in such a manner as not to enter the ignition chamber.

In the drawing, I have shown a part of a two-cycle engine embodying the invention.

Figure 1 is a central longitudinal section of the working cylinder with the piston and Fig. 2 is a cross-sectional view of the same engine. Fig. 3'is a sectional view of a valve for controlling he auxiliary air-pump. `to the drawing, the air passage to extend from the compresbehind the piston into, the working cylinder. The outlet opening b for the gases is situated at the side oi the cylinder which is diametrically opposite to that Referring a Iis supposed sion 'chamber i at which the passage a enters the saine.

' sides of partment Z (Fig. 2'

consists in providing 'the ignition chamber, whereas,

compartment is left ,open and c is the ignition chamber, and d is the air passage leading into the same.

f is the recess in the piston g which causes the air issuing through the passage a to pass along the inner side of the cylinder wall. The said arrangement is in all parts before known and acts in such a manner that at each stroke of the engine, whether it is loaded or not, the air passing throughl the middle part of the recess f enters into the passage d, whereas the air moving at the the said recess is caused to pass along the inner side of the cylinder cover without entering the ignition chamber.

According to the invention the recess in the piston is divided by partitions k into suitably three compart ents ofwhich the middle one Z is located just opposite-the pas- The air passage m has corresponding partitions fn.. Placed in the compartments formed by the said partitionsare shutters 0, one in each compartment. Thus, if the middle com artment is closed, no air passes into the mi dle compartment l of the iston and, in consequence thereof, no or an inconsiderable quantity of air passes into if the middle the lateral compartments are closed, all the air or the atest part thereoi passes through the i ition chamber. If one side passage is c osed, the air obviouslJ` passes partly thro h the i nition cham er and partly in the cy 'nder a ong the inner side of the cover thereof. 'y

In usin the aforesaid auxiliary air-pump, the same is `suitabl `connected to the comthe former.

It is obvious that the invention may be carried Aout in several ways without departinglfrom the spirit of the invention which means for conducting a greater or lesser part of the cleaningair through the ignition chamber or preventing it'from entering the saine. The 'controlling rent of cleaning-air end thereo exposed c eaning-air at intervals,

automatically by means of a governor driven from the engine.

I claim: i 1. In an internal combustion engine, the combination of a working cylinder, a separate ignition chamber communicating with the said cylinder, means for causing a curto pass through the said cylinder at intervals, and 'means for controlling the path of the air current in such a manner as to cause a greater or less part'of the air current to pass chamber.

2. In an internal combustion engine, the combination of a working cylinder, a separate i ition chamber communicating with the said cylinder, rent of cleaning-air to pass through the said cylinder at intervals, and shutters for controlling the path of the air current in such a manner as to cause a greater or less part of the air-current to pass through the ignition chamber.

3. In an internal combustion engine, the combination of a workingcylinder, a working piston having-recesseslopening into the through the ignition v means for causing a 'curend thereof exgosed to the workingpressure,

an ignition c amber communicating with the cylinder through an inlet opening cooperating with a recess in the said piston, means for supplying a current of air to the recessed piston at intervals, and means for controlling the quantity of air supplied to the different recesses i' the piston.

4. In an internal c bustion engine, -the combination of a working cylinder, a working piston having recesses opening into the to the working pressure, an ignition chamber communicating wit the' cylinder through an inlet opening cooperating with a recess in the said piston, means for supplying a current of air to the recessed piston at intervals, and shutters adapted to be operated independentlyA of air supplied to the diierent recesses in the piston.

each other for controlling the quantity of 5. In an internal combustion engine, the V` I a workcombination of a' working cylinder, ing piston having recesses end thereof exposed to the working pressure, an ignition cham cylinder through an inlet` ating with a recess in the sai piston, passage leading through the wall an air' of the iis opening into the A r communicating withthe f c linder' to the recessed piston for supplyin and shutters place in the said passage for'controlling the quan? tity of air supplied to the dierent recessesv inthepiston. l '6.- In an internal combustion engine, the combination of'a working cy der, a 'working piston having recesses o v g mmh@ @nd themfexposed', t0 the, Working press' 2.13

, shutters placed in the said ling the path plying cleaning-air at intervals, said ner as to cause a greater or vair current to pass through the ignition Sure, anl ignition chamber communicating with the cylinder through an inlet opening coperating with a recess in the said piston, and an air passage leading through the Wall of the cylinder to the recessed piston for supplying cleaning-air at intervals, said4 passage bein divided at the end thereof next to the cy inder into compartments, each leading to one of the recesses in the piston.

7. In an internal combustion engine, the combination of a working cylinder,` a Workin piston having recesses opening into the en thereof exposed to the working pressure, an ignition chamber communicating with the cylinder through an inlet opening coperating with a recess in the said piston, an air passage leading through the Wall of the'cylinder to the recessed piston for supassage being divided at the end thereof nexlt to the cylinder into compartments, each leading to one-of the recesses in the piston, and compartments for controlling the-quantity of air supplied to the different recesses in the piston.v

8. In an' internal combustion engine, the combination of a Working cylinder, a separate ignition chamber communicating with the said cylinder, means for causing a current of cleaning-air to pass through the said cylinder at intervals, and pump supplying cleaningair passing through the cylinder and the ignition chamber at intervals for expelling the gas residue after the explosion.

9. In an internal combustion engine, the

arate ignition chamber communicating with the said cylinder, means for causing a current of cleaning-air to pass through the said cylinder at intervals, means for controlling the path of the air current in such a manless part of the chamber, and an auxiliar air-pump supplying cleaning-air to the ignition chamber.

10. In. an internal combustion engine, the

combination of a Working cylinder, a separate ignition chamber communicating with the said cylinder, means for causing a current of cleaning-air to pass through the said cylinder at intervals, shutters for controlof the air current in such a manner as to cause a greater or less part of the air current toV pass-through the ignition chamber, and an auxiliary air-pump supplying cleaning-air to the ignition chamber.

11. In an internal combustion engine, the combination of a Working cylinder, a Working piston having recesses opening into the end thereof exposed to the working pressure, an ignition chamber communicating With the cylinder through an inlet opening cooperating with a recess in the said piston, means for supplying a current of air to the an auxiliary airi recessed piston at intervals, and an auxiliary 1air-pump supplying cleaning-air to the ignition chamber.

12. In aninternal combustion engine, the combination of a working cylinder, a working piston having recesses openinginto the end thereof vexposed to the working pressure, Aan ignition c amber communicating with .the cylinder through an inlet opening cooperating With a recess in the said piston, means for supplying a current of air to the recessed piston at intervals, means for controlling the quantity of air 'supplied to the different recesses in the piston, and an aux.- iliary air-pump supplying vcleaning-air to the ignition chamber. l v

13. In an internal combustion engine, the combination of a working cylinder, a Working piston having recesses opening into the end thereof ex osed to the Working pressure, anv ignition ch the cylinder through an inlet opening cooperating With a recess inthe said piston, means for supplying a current of air tothe recessed piston at intervals, shutters for controlling the quantity of air supplied to 'the diierent recesses in the piston, and an auxiliary air-pump supplying cleaning-air to the ignition chamber. l 14. In an internal combustion engine, the combination of a Working cylinder, a Working piston having recesses opening into the end thereof ex osed to the Working pressure, an ignition c amber communicating with the cylinder through an inlet opening cooperating With 'a recess in the said piston, an air-passageleading through the walt of the cylinder to the recessed piston for supplying cleaning-air at intervals, shutters placed in the said passage for controlling the quantity of air supplied to the'diii'erent recesses in the piston, and an auxiliary airpump supplying cleaning-air to the ignition chamber.

15. In an internal combustion engine, the combination of a working cylinder, a Working piston having'- recesses opening into the end thereof exposed to the Working pressure, an ignition chamber communicating the cylinder through an inlet opening cooperating-with a recess in the said piston, an air passage leading through the Walt` of the cylinder to the recessed piston for sup` plying cleaning-air at intervals, said pas sage being divided at the end thereof next to' the cylinder into compartments, each leading to one of the recesses in the piston, and an auxiliary air-pump supplying clean` ing-air tothe ignition chamber.

16. In an internal combustion engine, the combination of a Working cylinder, a Working piston having recesses opening into the end thereof exposed to the Working pressure, an ignition c amber communicatin with the cylinder through an inlet opening cowith.v

4 eeeee l opereting with e recess in the said piston, f trolling the quantity of air-supplied to the i im air peseege lendmg through the wall of different recesses in the piston, and an aux- 1o the cylinder to the recessed iston for supllll'y alf-pump Supplying cleaning-air to Elying cleaning-air at interva s, said passage the Ignition chamber. 4 5 cmg divided et the end thereof next to the ERK ANTON RUNDLF.

cylinder into compartments, each leading to Witnesses: one of the recesses in the piston, shutters AUG. SonnNsnN,

placed in the seid compartments for conl KARL RUNnsnos. 

